This biestable touch circuit was found in American 1980s documentation. The circuit must not be powered by a source without a transformer. Sensitivity depends on the 10 M resistors.
This bar or moving point indicator (bargraph) employs the LM3914 and can excite 10 LEDs, of any...
This battery-powered micropower supply was shown in Radio Electronics magazine in 1991. The...
This circuit must be powered by a symmetrical source and has a very high input impedance. The...